Attack of the broken feed reader

I look at my web server logs from time to time. Sometimes I notice
patterns. In particular, feed reader software which is polling for the
Atom feed (atom.xml) can occasionally do some very strange things. Of
course, when it does, there's usually no contact info, so I can't
exactly reach out to the owner to ask what's up. All I can do is shame
them here.

With that in mind, here's one ridiculous example, with the IP address
rubbed out to protect the guilty. (Perhaps they can identify themselves
from the git hash of the ttrss build they have.)

First, it pulls the atom.xml itself. Note that this file is 443 KB and
thus contains the complete contents of all of the posts going back quite
a ways. I have it limited to 100, which currently goes back to August
2013.

101 HTTP requests in 17 seconds, or almost 6 QPS from a single client...
for content they already have hundreds of times over. This isn't
breaking anything since it's all static content and it's coming from RAM
on my end, but come on, it's pointless.